Greenwich, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45.2 °F (low) to 67.1 °F (high). Annual precipitation averages 35.3 Inches. Greenwich is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.6 °F | 42.3 °F | 0.88 in. |
| February | 24.5 °F | 46.8 °F | 1.38 in. |
| March | 33.9 °F | 57.4 °F | 2.49 in. |
| April | 43.5 °F | 66.6 °F | 3.21 in. |
| May | 54.7 °F | 75.3 °F | 5.45 in. |
| June | 64.7 °F | 85.6 °F | 5.13 in. |
| July | 68.9 °F | 90.5 °F | 3.91 in. |
| August | 67.1 °F | 89.0 °F | 3.97 in. |
| September | 58.9 °F | 81.6 °F | 3.05 in. |
| October | 46.2 °F | 69.7 °F | 2.95 in. |
| November | 34.2 °F | 56.1 °F | 1.66 in. |
| December | 24.6 °F | 44.3 °F | 1.25 in. |
| Annual | 45.2 °F | 67.1 °F | 35.33 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |